1.

Which of the following is an endothermic reaction

Answer»

`2H_(2)+O_(2)rarr2H_(2)O`
`N_(2)+O_(2)rarr2NO`
`2NaOH+H_(2)SO_(4)rarrNa_(2)SO_(4)+2H_(2)O`
`3O_(2)+C_(2)H_(5)OHrarr2CO_(2)+3H_(2)O`

Answer :B


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